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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > Power Management - Specialized

STMicroelectronics L482D1013TR

Name: L482D1013TR
Brand: STMicroelectronics
SKU: L482D1013TR
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: L482D1013TR

Manufacturer:: STMicroelectronics

Category:: Power Management - Specialized

Package:: 16-SOIC (0.154", 3.90mm Width)

Datasheet:: L482D1013TR.pdf

Description:: IC CTRLR HALL-EFFECT IGN 16SOIC

Quantity:: RFQ Add To RFQ list

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Product details

Overview

L482D1013TR from STMicroelectronics is a Hall-effect ignition controller IC designed to directly drive external NPN power Darlington transistors in breakerless automotive ignition systems. It provides coil current dwell angle control, peak current limitation (400 mV sensing threshold), desaturation time monitoring (0.6–1.57 ms), and permanent conduction protection with 1 s delay (1 µF/100 kΩ). It operates across 6–28 V supply and supports 4-cylinder engine speeds up to 6000 RPM.

For engineers reviewing the L482D1013TR datasheet, L482D1013TR pinout, L482D1013TR application, or L482D1013TR equivalent, key selection considerations include dwell timing accuracy vs. engine speed, desaturation pulse integrity for spark energy consistency, Darlington overvoltage protection threshold tuning (via R5/R6), and compatibility with Hall-effect sensor duty cycle (~70%) and open-collector output.

Technical Context

The L482D1013TR implements dual-capacitor dwell control using C2 (dwell timing) and C5 (speed-compensated reference), where VC2/VC5 comparison sets conduction start point. Its internal current-sensing comparator activates feedback when V_SENS reaches 200–400 mV, forcing the Darlington into active region to clamp coil current.

It delivers three synchronized timing outputs: CONDUCTION TIME (pin 1, TTL-compatible ON-state signal), DESATURATION TIME (pin 6, open-collector pulse during current limiting), and PERMANENT CONDUCTION RESET (pin 9, low pulse ≥100 µs upon protection activation). All protections-including load dump (100 V, ≤300 ms decay), reverse battery, and Darlington overvoltage-are implemented via dedicated pins with external resistor dividers.

Key Specifications

Parameter	Value and Actual Design Meaning
Supply Voltage Range	6–28 V - Supports full automotive battery range including cold-crank (6 V) and load dump transients.
Current Sensing Threshold	200–400 mV - Sets precise coil peak current limit; enables design of 6 A, 6 mH coil systems.
Desaturation Time	0.6–1.57 ms - Ensures sufficient active-region time for consistent spark energy during acceleration.
Dwell Protection Delay	1–5 s (typ. 1 s with 1 µF/100 kΩ) - Prevents coil burnout during cranking or stalled-engine conditions.
Load Dump Withstand	100 V, ≤300 ms decay - Meets ISO 7637-2 Pulse 5a requirements without external clamping.
Hall Input Compatibility	Open-collector, ~70% duty cycle - Matches standard Hall-effect pickup sensors used in distributorless ignition.
Output Driver Saturation	V_CE(sat) = 0.4–1.0 V @ 70–150 mA - Minimizes power loss in internal driver stage feeding Darlington base.

Pinout & Package

Package: DIP16 (0.300" wide, 20.0 × 8.5 mm body, 2.54 mm lead pitch). Pin 9 (PERMANENT CONDUCT. RESET OUTPUT) confirms DIP16 package identity per datasheet Figure 3 and pin function table.

Pin/Terminal	Circuit Role	Design Meaning
1	CONDUCTION TIME SIGNAL	TTL-compatible output indicating Darlington ON-state (coil current flow); used for ECU dwell validation.
2	HALL-EFFECT INPUT	Open-collector interface for Hall sensor; rising edge enables coil charging, falling edge triggers spark.
3	DWELL CONTROL	Connects to C2 capacitor; average voltage determines dwell timing based on engine speed and supply.
6	DESATURATION TIME SIGNAL	Open-collector pulse during current limiting; duration reflects actual coil energy regulation.
8	PERMANENT CONDUCT. PROTECTION TIMER	Connects to C1 (1 µF typical); sets 1 s timeout before forced coil current ramp-down.
9	PERMANENT CONDUCT. RESET OUTPUT	Active-low pulse ≥100 µs signals permanent conduction protection activation (DIP16 only).
10	CURRENT SENSING INPUT	Inputs voltage from Rs sense resistor; comparator triggers at 200–400 mV to limit I_coil.
12	POWER SUPPLY	7 V zener-protected input; external R7 limits current during overvoltage events.
14	DRIVER COLLECTOR	Supplies internal driver collector current to Darlington base; R10 sets dissipation margin.
16	DRIVING STAGE OUTPUT	Base drive output; requires C3/R3 (1–100 nF / 2 kΩ) for stability with external Darlington.

Key Features

Feature	Design Value
Dual-Capacitor Dwell Control	C2/C5 matching enables speed-compensated dwell timing-maintains constant t_d across 30–6000 RPM (4-cyl).
Three-Timing-Output Interface	Simultaneous Von (pin 1), V_ds (pin 6), and V_rs (pin 9) provide real-time feedback for digital ECU synchronization.
Programmable Load Dump Threshold	External R8/R9 divider on pin 11 sets V_Dth ≈ 8.5×(R8+R9)/R9 + 0.0005×R8 - allows tuning to vehicle-specific battery transient profiles.
Integrated Darlington Overvoltage Clamp	Internal zener at pin 15 + R5/R6 divider actively limits external Darlington collector voltage to prevent breakdown.
Permanent Conduction Safety Ramp	Upon 1 s high-Hall condition, coil current decays linearly to zero-eliminates risk of thermal runaway or misfire.

Applications

Automotive Distributorless Ignition (DIS)

Racing Engine Control Units (ECU)

Use Scenario: High-energy spark generation in 4-cylinder gasoline engines without mechanical distributor, using Hall-effect crank position sensing.

IC Role / Device Role / Timing Role: Primary ignition controller managing dwell angle, coil current peak, and desaturation timing; provides Von/Vds/Vrs timing signals to ECU.

Use Value: Enables consistent spark energy across 30–6000 RPM by maintaining fixed desaturation time (t_d) while adapting dwell start point via C2/C5 voltage comparison.

Use Scenario: Precision ignition timing in high-RPM race engines where spark energy must remain stable during rapid acceleration (≤80 Hz/s).

IC Role / Device Role / Timing Role: Real-time coil current regulator with programmable protection thresholds; feeds timing diagnostics to race ECU for closed-loop dwell adjustment.

Use Value: Desaturation pulse (pin 6) and conduction signal (pin 1) allow ECU to verify actual coil energization window-critical for knock-limited timing maps.

Aftermarket Ignition Modules

Industrial Gas Engine Ignition

Use Scenario: Retrofit electronic ignition upgrade for classic vehicles with original points-based systems and Hall-effect pickups.

IC Role / Device Role / Timing Role: Direct replacement for mechanical breaker points; interfaces with legacy Hall sensors and high-energy coils.

Use Value: Permanent conduction reset (pin 9) prevents coil overheating if ignition key remains ON with engine stopped-essential for vintage vehicle safety.

Use Scenario: Ignition control in stationary natural gas engines used in power generation, where reliability under voltage transients is critical.

IC Role / Device Role / Timing Role: Robust ignition driver with 100 V load dump protection and reverse battery immunity-operates without external TVS diodes.

Use Value: Integrated dump protection (pin 11) and Darlington overvoltage clamp (pin 15) reduce BOM count and improve field failure MTBF in harsh industrial environments.

Equivalent & Alternatives

The following parts are listed as comparable options for similar ignition controller applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
UC3846N	Current-mode PWM controller with 1 MHz max frequency; no integrated Hall interface or permanent conduction timer.	Requires external Hall signal conditioning and discrete protection logic; suited for custom flyback or resonant ignition designs.	Select when designing non-standard ignition topologies requiring variable-frequency control-not for direct Hall-sensor-based DIS replacement.
MC33794	Single-chip ignition driver with integrated Darlington; lacks separate dwell/desat timing outputs and programmable dump threshold.	Fixed internal protections; no pin-accessible V_rs or V_ds signals for ECU diagnostics-limited closed-loop capability.	Select for cost-sensitive OEM modules where ECU does not require timing feedback; not suitable for tunable aftermarket systems.

Compared with UC3846N and MC33794, the L482D1013TR uniquely combines Hall-native interface, three independent timing outputs, and field-programmable protection thresholds-enabling both robustness and diagnostic transparency in production and performance ignition systems.

Availability

L482D1013TR is available at Aetrix Electronics and suitable for automotive distributorless ignition systems, racing ECU modules, aftermarket ignition upgrades, and industrial gas engine controls requiring stable component supply and long-term lifecycle support.

Supply support for L482D1013TR includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, specializing in automotive, industrial, and power management ICs with broad manufacturing and quality certifications.

The L482 belongs to ST's automotive ignition controller product line, engineered specifically for Hall-effect–based breakerless ignition systems requiring precise dwell control, multi-level protection, and real-time timing feedback to microcontroller-based ECUs.

FAQ

What is the function of Pin 9 (PERMANENT CONDUCT. RESET OUTPUT) and is it available on all packages?

Pin 9 delivers a low-going pulse ≥100 µs when permanent conduction protection activates-signaling the ECU that coil current has been intentionally ramped down after >1 s of continuous Hall input. This pin is exclusive to the DIP16 package; SO16 omits it entirely, repurposing pin 9 as Current Sensing Input per datasheet page 3 footnote.

How is the dwell angle dynamically adjusted across engine speed ranges?

Dwell angle adapts via dual capacitors: C2 discharges at constant rate during Hall LOW; C5 charges during Hall HIGH. The VC2/VC5 comparison sets conduction start time. As speed decreases, C2 average voltage rises-delaying dwell start to maintain fixed desaturation time (t_d), ensuring consistent spark energy during acceleration.

Can the L482D1013TR be used with coils other than 6 mH / 6 A?

Yes-the L482D1013TR supports variable coil inductance and current ratings via external component tuning. For coils with different L/I characteristics, adjust C2/C5 values, R11 (pin 7), and Rs (current sense resistor) to recalibrate dwell timing and peak current threshold per equations in datasheet sections 4.3 and 4.4.

What external components are mandatory for basic operation?

Mandatory components include: C2 and C5 (100 nF each, matched), C1 (1 µF for 1 s protection), R11 (100 kΩ at pin 7), Rs (sense resistor sized for target I_peak), R7 (current-limiting resistor at pin 12), and R10 (collector current limiter at pin 14). C3/R3 (1–100 nF / 2 kΩ) is required for driving-stage stability per datasheet Figure 3.

L482D1013TR Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: -

Package/Case:: 16-SOIC (0.154", 3.90mm Width)

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

Applications:: -

Current - Supply:: 25mA

Voltage - Supply:: 6V ~ 28V

Operating Temperature:: -40°C ~ 125°C

Grade:: Automotive

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 16-SO

L482D1013TR FAQ

1.How can I place an order for L482D1013TR through Aetrix?

Please submit a Request for Quotation (RFQ) for L482D1013TR on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for L482D1013TR reliable?

The price and inventory of L482D1013TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for L482D1013TR is usually 5 days.

3.What payment methods are accepted for L482D1013TR?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for L482D1013TR transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for L482D1013TR?

L482D1013TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your L482D1013TR order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for L482D1013TR?

For technical support, including L482D1013TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your L482D1013TR requirements.

6.How does Aetrix verify that L482D1013TR is sourced from the original manufacturer or authorized distributors?

All L482D1013TR products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that L482D1013TR meets industry standards.

7.What is the process for return or replacement of L482D1013TR?

All L482D1013TR units undergo pre-shipment inspection (PSI). If there is an issue with L482D1013TR, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The L482D1013TR part is unused and in its original packaging.

Return procedure for L482D1013TR:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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